Filmed inside a combustion chamber!
 

Here is a film made inside an actual operating four stroke engine. The film is looped several times, but it cuts off just before the end of the exhaust stroke. Fascinating to actually see what goes on in there!

http://youtu.be/UvmBLqjaZxY

That is pretty neat. Wonder why they don't show the exhaust stroke?

Man, that's cool. Got to wonder how that camera was set up in there.

Very interesting! I wasn't expecting an orange flame, for some reason. Guess the "Blue Flame Six" really was just ad jargon!

That's exactly what it was. I would guess that the only true "blue flame" engines are those that run on propane.

Blue *is* correct, the small amount of yellow might indicate a "rich" area in the chamber.

from: http://www.carbtune.com/colortune.html

not affiliated with carbtune,
jr